Steam engine



' 2 sheets -sheet 1. W. K. KIGHT.

STEAM ENGINE.

(No Model.)

No. 382,309. Patented May 8, 18 88.

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W.'K. KIGHT.

1 STEAM ENGINE. 7 No. 382,309. Patented May 8,1888;

llilllll ill iiill Ill lllllllllll UNITED STATES PATENT Orricn.

WILLIAM KIETH KIGHT, OF KEENERS, MISSOURI, ASSIGNOR OF ONE'FIFTH TO J. A. BOHNERT, OF SAME PLACE.

STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 382,309, dated May 8, 1888.

Application filed December 1, 1887. Serial No. 256,680. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAMKIETH KIGHT, a citizen of the United States, residing at Keeners, in the county of Butler and State of Missouri, have invented a new and useful Improvement in Steam -Engines, of which the following is a specification.

My invention relates to an improvement in steam-engines; and it consists in the peculiar construction and combination of devices that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a top plan view of a steam-engine embodying my improvements. Fig. 2 is partly a side elevation and partly a vertical longitudinal 'sectional view on the line a: :t of Fig. 1. Fig. 3 is a vertical transverse sectional view taken on the line 31 y of Fig. 1.

A represents the bed of the engine, on one side of which is secured a'steam-cylinder, B, having a steam-chest, O, on its upper side,and ports D and E extending from the said steamchest to the ends of the cylinder.

F and G represent a pair of pipes, which extend from the ends of the cylinder, and are each provided with a port, H. The capacity of the said ports is much greater than the capacity of the inlet-portsD andE. Transverse openings are made in the pipes F and G and intersecting the ports therein,and in the said transverse openings is fitted an exhaust slidevalve or bar, I, which is provided with ports K, adapted to register alternately with the ex haiist-ports H of the pipe. The said slide /Va1ve or bar is arranged steam-tight in the exhaust-pipes by means of suitable packingboxes, as shown.

L represents parallel guideways,which pro- 40 ject from the front end of the cylinder B, and

in the said guideways is guided a cross-head, M, which is connected to the piston-rod in the usual manner, and is also connected to the inner ends of a pitman, N, the outer end of the said pitman being connected to a crank on the bearing-shaft O.

1? represents a rock-shaft,which is journaled in a bearing at a suitable distance in front of the cylinder, and below the same and to the inner end of the said rockshaft is attached a rock-arm, R. A pin, S, extends transversely through the upper end of the rock-arm, and to one end of the said pin is connected the front end of a valve-rod, T, the said rod being connected at its rear end to a slide-valve, U, in the steam-chest, the said valve being adapt ed to alternately uncover the inlet-ports D E of the steam-cylinder.

V represents an eccentric, which is secured to the driving-shaft, and to which is attached the front end of a pitman, W. The rear end of the said pitman is connected to the pin S.

X represents an eccentric, which is also secured to the driving-shaft, and is arranged at asuitable angle with relation to the eccentric V. A pitman, Y, connects the said eccentric X to the exhaust-valve or slide-bar I.

The operation of my invention will be very readily understood from the foregoing description in connection with the accompanying drawings. The eccentrics are so timed that when the valve U opens one of the inlet-ports of the steam-cylinder the slide-valve I has one of its ports arranged opposite the exhaust-port in the pipe leading from the opposite end of the cylinder; and inasmuch as the capacity of the exhaustports is very much in excess of the inlet-ports it follows that dead steam is prevented from exerting back-pressure on the piston, as the same is moved in either direction by the pressure of the live steam against it; consequently the capacity of the engine is increased.

Having thus described my invention, I claim l. The combination,in a steam-engine,of the cylinder having the steamchest and the inlet ports communicating with the steam-chest near the center thereof, and with the cylinder near the ends thereof, the exhaust-pipes F G projecting transversely from the ends of the cylinder, and having the exhaustports, the slide-valve U,arranged in the steam-chest and adapted to alternately uncover the inlet-ports,- and the exhaust slide-valve I, secured to the exhaust-pipes, and having the ports K, adapted to alternately register with the exhaust-ports, substantially as described.

2. The combination,inasteam-engine,of the cylinder having the steam-chest, and the inletports communicating with the steam-chest near the center thereof, and with the cylinder near the ends thereof, the exhaust-pipes F G, projecting transversely from the ends of the cylinder and having the exhaust-ports, the slidevalve U, arranged in the steam chest and 5 adapted to alternately uncover the inlet-ports,

the exhaust slide-valve I, secured in the exhaust-pipes, and having the ports K adapted to alternately register with the exhaust-ports, the driving-shaft having the eccentrics V X,

10 the pitman Y, connecting the latter with the valve I, the rockimg-arnn R, connected to the valve U, and the pitman connecting said arm to the eccentric V, substantially as described.

In testimony that I claim the foregoing as my own I have hereto afifixed my signatureinpres- I 5 ence of two witnesses.

. WILLIAM KIETH KIGHT.

Witnesses:

I. M. DAVIDSON,

J N0. N. PEARCE. 

